We don't need no steenkin covert course,
what we need is a game for lockpickers,
If youve ever watched that japanese game show called Takeshis Castle, there is a thing that has a lot of hexagonal shaped rooms with three or more doors that is a maze, in which japanese monsters are hunting the player,
now think of those doors with locks of various difficulty levels, and make the game so that if someone can win by opening all the easy locks they will have a longer and more confuseing time stuck in the maze, while those who can open some difficult locks can then find keys inside in case they need to open that lock again, and they can get quickly through the maze by opening the difficult locks So that there are two ways to go through the maze, opening a lot of easy locks or a few hard ones, that control a completely different path that no one can access by an easy lock.
Im thinking of an old computer game from the 90's called "labyrinth" where the players can find keys and other stuff that is helpful or if we could find a building to mod for a game.... It could be a business that attracts players from a long distance since it would be the only such place, it could also have nodes of it that have airsoft or paintball aspects and even special games that are covert entry or escape scenarios.
Wake up and smell the Kafka!!!